Development of terrain height multipliers and roughness lengths for Seberang Perai reogion
Malaysia has developed its own standard of practice in wind loading known as MS 1553:2002 Code of Practice on Wind Loading for Building Structure. During the development of this Malaysian Standard, reference was made to Australian Standard due to the similarity of wind climate between Malaysia an...
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| Format: | Thesis |
| Language: | English |
| Published: |
2010
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/2188/ http://umpir.ump.edu.my/id/eprint/2188/1/NORHAIZA_BINTI_GHAZALI.PDF |
| Summary: | Malaysia has developed its own standard of practice in wind loading known as MS
1553:2002 Code of Practice on Wind Loading for Building Structure. During the
development of this Malaysian Standard, reference was made to Australian Standard
due to the similarity of wind climate between Malaysia and Australia. In the same
time, researches have been carried out in order to update all parameters in MS
1553:2002 based on Malaysia wind climate. Seberang Jaya Telecommunication
Tower was selected as the study area representing terrain Category 3: Suburban area
for Seberang Perai region. An eight years period of data are recorded at three
different levels by using the Ultrasonic Wind Sensor (UWS). Power Law profile is
the best equation fit with the vertical wind speed profile at the study area as proven
by Ramli (2005). In this study, Terrain Height Multiplier, Mz,cat, and Roughness
Length, z0 for all terrain categories in Seberang Perai region are defined by using
statistical and mathematical method. From the results obtained, the proposed M4cat
for all terrain categories are much lower than the current values in MS 1553:2002.
The difference up to 19% obtained due to the fact that Australia and Malaysia have
different wind climate. A reasonable good agreement and a consistent result for Mz,cat
can be noted from the comparison of the proposed value to the other international
codes and standards. The proposed z0 for all terrain categories are in range from 0.03
m to 1.13 m which is still in the overall range for all codes and standards. |
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